PCR (polymerase chain reaction) is a relatively new advance (1980's) but it has a great impact in our lives. Specifically, in forensic science, PCR is useful in many sorts of crimes . Up until the PCR method, in order to identify a person forensic scientists would use fingerprints or some other ambiguous methods like teeth marks etc. But now, with PCR, we can compare the genetic material found on a crime scene and compare it with a suspect's genetic material, definitively concluding whether they are the same person or not. The way this works is that we collect a sample from the crime scene with DNA and then PCR amplifies the quantity of DNA in that sample. One of the apparent advantages of this method is that PCR works with even a very small sample, often not even a single cell is required. This makes crime scenes full of information. Hence, succinctly, PCR has helped modern forensic science in that:
1) its results are more definitve than traditional identification methods and subject to less ambiguity
2) it is relatively fast
3) new pieces of evidence can be of value (like some hair cells) and identify the crominal in cases that in older times would be impossible to solve.
The correct should be a. human-dominant view
Humans are dominant and if they decide to cut it down then it must be so. That is the human-dominant view that is shown here by loggers.
Answer:
The correct answer will be- distal
Explanation:
In anatomy, the anatomist defined the standard position and movement of the bones of the skeletal system by universal anatomical terminologies.
The directional position of the bones of arms and legs is represented by the proximal and distal plane.
The proximal direction represents the bone closest to the point of origin or reference while distal represents the bone closest to the farthest away from the reference. Since the left wrist is farther from the reference or the elbow therefore, it is considered distal to the elbow.
Thus, distal is the correct answer.
Explanation:
the food u eat will goes from oesophagus to ur stomach and then it is mixed by hcl present in your stomach that makes the medium acidic for pesin to digest protein and then bile juice from liver makes the medium alkaline and breaks the larger globules of carbohydrates for enzymes then the food goes goes to small intestine that secretes intestinal juice that converts carbohydrates into glucose
Answer:
4. Circular Chromosomes
Explanation:
We know that eukaryotic chromosomes consist of double-stranded DNA.
But prokaryotic chromosomes are actually circular, which is very different from eukaryotic.
